138535535 has 4 divisors (see below), whose sum is σ = 166242648. Its totient is φ = 110828424.

The previous prime is 138535519. The next prime is 138535541. The reversal of 138535535 is 535535831.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138535535 - 2⁴ = 138535519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13853549 + ... + 13853558.

It is an arithmetic number, because the mean of its divisors is an integer number (41560662).

Almost surely, 2^138535535 is an apocalyptic number.

138535535 is a deficient number, since it is larger than the sum of its proper divisors (27707113).

138535535 is an equidigital number, since it uses as much as digits as its factorization.

138535535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27707112.

The product of its digits is 135000, while the sum is 38.

The square root of 138535535 is about 11770.1119365960. Note that the first 3 decimals coincide. The cubic root of 138535535 is about 517.4325302752.

The spelling of 138535535 in words is "one hundred thirty-eight million, five hundred thirty-five thousand, five hundred thirty-five".